Radio transmitting and receiving system



Oct. 29, 1940. El GOSSEL 2,219,922

RADIO TRANSMITTING AND RECEIVING SYSTEM Filed Feb. 25. 1958 7- EAI/@wmasc/mvg? Pfam/wg c/maf/ Oem/7 4cm/,27W C'a// /lA/Er Z2 3 Patented oct'.29,1940 'Y t y`Z219,9221v UNITED. '-SIATE'S .PATENT forum-1; a 2,219,922p L v r RADIO TRANSMIT'HNG AND vRECEIVING 7 SYSTEM l ,v v ErichGosseLlBerlin, Germany, assigner to C.

Lorenz Aktiengesellschaft, Berlin-Tempelhof, a 1 Germany,acompanyApplication February 23, 1938, serial No. 192,103

. .l In Germany FebruaryZZ, 1937 v s ciaims. (ci. 25o- 13) (Grantedunder theprovisions-of sec. 14, act o1' l `MarchZ, 1927; 357 G. 5) Y Y p.l The present invention relates to radio systems 'Figi 2 illustratesone embodimentof thedefor intermittently.transmitting and receiving hightuning member which may be a strap (of sheet frequency"oscillations,preferably' ultra short metal bentfinto theform'ofa channel of' semi-Waves. circularY cross section, for instance, pivotallyvIt ris Wellknown in two-way'transmission and mountedonl a spindle 8 and actuated ina manner reception of high frequency oscillations to emherx'einafterydescribed. In thel state of transploy means for disconnecting either thereceiving mission, the member i's spaced from the inequipment duringtransmission, or the transmitductancei3 of the'oscillatory circuit,while moved' ting equipment during reception.' Under certain in close`proximity thereto in a stateof reception y l0 operating conditions,particularly in connection solas-to exert -de-tuning `of thetransmitting o-s- 10 with a single antenna system, the disadvantagecillatory circuit. f a prevails that the transmitting equipment absorbsEquipments utilized in ultra short wave comenergy from the electricalwaves With the result munication are generally mounted in a boxthat theenergy supply to the receiving equipshapedcasing which is provided withan operament decreases. tors panel having a key manually actuated bythe'115 The present invention consists incertain feaoperator when thesystem is changed from. transtures of novelty which will appear from thefol- `mission to reception or viceversa, whereby the lowing descriptionand be pointedout in the ap- `plate voltage is applied to one circuitand disconpended claims, reference being made to the acnected from` theother, e. g., by the agency of companying drawing, in whichcontact I ofFig. k1. Y 20 Fig. 1 schematically illustrates a wiring dia- Accordingto a further feature of the invention, A gram of an arrangement forintermittent trans- V'the operation of the above'mentioned keysimulmission and reception embodying the invention; taneously influencesthe de-tuning member by Fig. 2 illustrates one form of de-tuning elementvmeans of a relay. This arrangement is shown for realizing theinvention; while Fig. 3 diagramin Fig. 3. The key Il controlling therelay] is 25 matically'illustrates a slightly mocliiied form of'`mechanically..coupled with the make and break de-tuning element withmagnetic means for actu-l `contact 1 (Fig 1), soi-that the de-tuning-ofthe ating it for realizing the invention. transmitting oscillatorycircuit on account ofthe The arrangement illustrated in Fig. 1, forinclose proximity between its inductance I3 and the stance, shows atransmitting oscillatory circuit swinging member 6 simultaneouslyreverses the 30 f 2 and a receiving oscillatory circuit 3 which areanode voltage from the` transmitting to the recoupled with a dipole Icommon thereto. These ceiving oscillatory circuit. vIt is obvious thatthe f two oscillatory circuits are standard' Hartley cir- Contact 'l'may .also be electrically controlled cuits, the capacities of which areformed by the by relay 1. The member 6 which in this eminherentcapacities of the tubes land 5, respecbodiment `is pivotally mounted atone end lon a 35, tively.v The energy of the oscillations received byspindle 8y is maintained `at earth potential and the antenna l isdistributed in both circuits, hence effec-ts a capacitive de-tuning ofits allotted oscil- -only the energy effectively received by therelatory circuitas soon as it is brought in close ceiving equipmentbecomes active. proximity to the inductance of said circuit. The 40 Thisdisadvantage is obviated according to the inner surface of the de-tuningmember is pro- 4,0l present invention which provides means fordevided`with an insulatingv layer l0 in order to tuning the oscillatory circuitof the transmitting prevent conductive connection to other elementscircuit during reception in order to permit all of the circuit. Thecapacitive d'e-tuning thus obn energy received to be applied to thereceiving tained with respect tothe transmitting circuit vis equipmentonly. For this purpose the invention such that no energy Will beabsorbed therein even 45 provides a swinging trough-like member which'if transmission and reception areeffected on the is indicated atin Fig.1 and which is simulsame or approximately the same wavelength.

taneously brought in close proximity to the trans- The same de-tuning ofthe receiving oscillatory mSSOIl OSClla'OIY Circuit 2 by magnet 'l con'-circuit may. be performed during vthe transmission trolled by key l l,vWhen the System iS Changed in order to permit theentire. energy of thetrans- 50 from transmission to reception. The swinging demitting circuitto be applied to the transmitting tuning member which is connected toground. at djp01e, Y

one end exerts in the position shown in the What is Claimed is;

drawing a strong capacitive de-tuningof the cir- 1. In an arrangementfor alternate transmiscuit to which it is allotted. sion and receptionof high frequencyoscillations 55- .A ting oscillatory circuit inaccordance With-said preferably ultra-short Waves, a transmittingoscillatory circuit, a receiving oscillatory circuit, an antenna commonto said oscillatory circuits, means for alternately rendering one andthen the other o-f saidoscillatory circuits operative, means forde-tuning one of said oscillatory circuits dur., ing the operation ofthe other of said oscillatory"` circuits, and means for causing bothsaid means' to operate in correspondence with each other.

2. In an arrangement for alternate transmissions and reception of highfrequency oscillations preferably ultra short Waves, a transmittingoscillatory circuit, .a receiving oscillatory circuit, an

antenna common to said @oscillatory circuits, means forchanging fromreceptionto transmission, and means for de-tuning the receivingfosjmeans for changing from transmission to reception.

4. In an arrangementA for alternate transmission and reception of highfrequency oscillations according to claim 3, having a switch at an op-.erators panel, means controlled through said switch for `simultaneouslyeffecting the actuation "f of said means Vfor changing from transmissionto "reception and the actuation of said means for moving said member. l

Y 5. In anarrangement for alternate transmission and reception of highfrequency oscillations preferably ultra `short waves, a transmittingoscillatory circuit, areceiving oscillatory circuit, an antenna commonto said oscillatory circuits, means for changing from reception totransmission a member for de-tuning the receiving os-.cillatoryfcifrcuit during transmission, and means v for moving saidmember relative to the receiving oscillatory circuit in accordance withsaid'means for changing from reception to transmission.

6. In an arrangement according to claim 5, a switch at an operatorspanel, means controlled through said switch for simultaneously effectingthe actuation of said means for changing from reception to transmissionand the actuation o-f said means for moving said member.

ERICH GOSSE'L.

